Composition for cores.



- UNITED STATES Patented June 2, 1903.

PATENT OFFICE.

ED F; MYERS, OF AKRON, OHIO.

COMPOSITION FOR CORES.

SPECIFICATION forming part of Letters Patent No. 729,637, dated. June 2, 1903. Application filed March 24, 1903. Serial No. 149,297. (No specimens-l To all whom it may concern:

Be it known that 1, ED F. MYERS, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Composition of Matter to be Used for the Manufacture of Cores,of which the following is a specification.

This composition of matter is to be used for the manufacture of cores with a view to forming openings or hollowplaces in castings made from molten metal; and the composition consists of the following ingredients combined in substantially the proportions statedviz. dextrine, ninety parts; silica sand, (pulverized white quartz,) ten parts. These ingredients are to be thoroughly mingled by agitation.

In using the above-named composition the sand for making the cores, which usually consists of molders sand, combined with sharp sand in the proportion of about one part molders sand to three parts of sharp sand, is mixed with a desired quantity of the above-described composition, and the proportion of this composition which is mixed with the sand will vary according to the difierent requirements of the work to be required of the cores. The dextrine and sand, which together form a granu lar powder, are thoroughly mingled with the sand from which the cores are to be made. When thoroughly intermingled, some liquid, as water or beer, is mixed with the mass until it has. reached the desired consistency, and from this mixture the cores are shaped and formed in suitable boxes. The cores thus produced are then baked in a core-oven until thoroughly dried.

It is well known that commercial dextrine contains a considerable percentage both of glucose and starch, the glucose resulting from the manufacture of the dextrine and the starch being the refuse or unchanged starch from which the dextrine is made.

By the use of the above composition the cores are produced in substantially as perfect a form as is possible, and the use of flour, molasses, &c. is entirely obviated, with a result that a cheaper and better core is produced 'than the one in which the well-known and common ingredients are used.

What I claim, and desire to secure by Let ters Patent, is

The herein-described composition of mat tor for making cores consisting of dextrine and silica sand or pulverized quartz in sub stantially the proportions hereinbefore de scribed.

In testimony that I claim the above I here unto set my hand in the presence of two subscribing witnesses.

ED F. MYERS. In presence of- C. E. HUMPHREY, MAUDE ZWISLER. 

